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i <br /> W <br /> d <br /> 11 <br /> Work Plan For A Limited Subsurface Investigation - Chevron Service Station #9-3232 <br /> October 2, 1998 <br /> cleaning rinsate waste water will be transported by IWM to McKittrick Waste <br /> Management in McKittrick, California . <br /> Task 3 . Well Development and Sampling <br /> Newly installed groundwater monitoring wells will be developed after being allowed <br /> to stand a minimum of 72 hours following. completion . During development, the <br /> clarity of the discharged well water and selected groundwater parameters (pH, <br /> 1 temperature , conductivity) will be monitored. When the clarity of the discharge water <br /> tuns clear and the groundwater parameters have stabilized , a groundwater sample will <br /> be collected . Groundwater removed from the well during development and sampling <br /> will be transported by IWM to McKittrick Waste Management. Groundwater samples <br /> will be analyzed as described in Task 5 . Development and groundwater sampling <br /> procedures are described in Appendix A. <br /> Task 4. Wellhead Survey <br /> Following installation, the elevations of each top of well casing will be surveyed to <br /> MSL by Virgil Chavez Land Surveying (PLS #6323) . Horizontal coordinates will <br /> also be measured . <br /> Task 5 . Laboratory Analyses <br /> Soil and groundwater samples will be submitted for chemical analysis by Sequoia <br /> Analytical (ELAP # 1216) in Sacramento , California . Selected soil and groundwater <br /> samples will be analyzed for TPHg Environmental Protection Agency (EPA) Method <br /> 8015 (Modified) , and for gasoline constituents benzene, toluene, ethylbenzene, total <br /> xylenes (BTEX) and methyl t-butyl ether (MTBE) by EPA Method 8020 . Two soil <br /> samples collected from the well boring in the vicinity of the used oil UST will also be <br /> analyzed for Total Petroleum Hydrocarbons as diesel (TPHd) by EPA Method 8015 <br /> Modified, Total Oil and Grease (TOG) by Standard Method 5520 E&F (soil) and B&F <br /> (water) , Volatile Organics (VOs) by EPA Method 8240 , Semi-volatile Organics <br /> (SVOs) by EPA Method 8270 , and CAM 5 Metals by EPA Method 6000/7000 series . <br /> Groundwater samples from all wells will be analyzed for the oxygenates ethanol , <br /> tert-butyl alcohol (TBA) , MTBE, di-isopropyl ether (DIPE) , ethyl tert-butyl ether <br /> (ETBE) , and tert-amyl methyl ether (TAME) by EPA Method 8260 . The sample of <br /> the drill cuttings will be analyzed for TPHg , BTEX, TPHd, and TOG . <br /> 346463.01-1 4 <br />